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AI 资讯 Reddit r/programming

Debugging Live Audio at Scale: QUIC and MoQ relays

A few weeks ago, a back-of-envelope calculation told us that scaling Tula Spaces to 100,000 concurrent listeners would need roughly 100 small VPS boxes. That number was scary enough to derail a roadmap conversation — and, as it turned out, almost entirely wrong. This is the story of how we got from that panic number down to a real, measured, production-ready plan: five boxes, not a hundred, with every claim backed by a test rather than a guess. If you're building anything real-time at scale — live audio, video, multiplayer, anything running over QUIC — the failure modes we hit are probably waiting for you too. The panic number was built on an assumption, not a measurement The original math went something like: X% of a CPU core per listener, therefore Y cores needed, therefore Z boxes. It felt rigorous because it had numbers in it. But every number in that chain was inherited from an untuned, default configuration nobody had actually interrogated. The first rule we relearned the hard way: a scary capacity number is a hypothesis, not a fact, until you've tried to break it on purpose. Myth #1: "It's too much crypto for one core" Our relay runs one process per box, encrypting media for every connected listener over QUIC. At ~0.4% of a CPU core per listener at a modest bitrate, the instinctive explanation was cryptographic overhead — AES doesn't usually struggle at these data rates, so something had to be off. It wasn't crypto. It was packet count . Our encoder was emitting one CMAF fragment every 21 milliseconds — about 47 fragments a second, each one a separate send over the wire, per listener. That's a syscall and framing tax, not a cipher tax. Crypto didn't even show up in a profiler trace once we went looking. The instinct to reach for "batch the fragments" didn't work, though — that's the first place the story took a turn. Myth #2: Batching the container doesn't touch the wire We tried extending the CMAF fragment duration from 21ms to 200ms, expecting a straightfor

/u/BigAppointment1020 2026-07-23 18:44 6 原文
开发者 The Verge AI

Google hit with $1 billion fine for breaking EU antitrust rules

The European Union has fined Google's parent company Alphabet €890 million (about $1 billion) for two separate violations of the bloc's Digital Markets Act (DMA). One penalty is for giving its own products preferential treatment in search results, while the other is for blocking Android developers from sending users to alternate payment options. A €460 […]

Robert Hart 2026-07-23 18:33 8 原文
AI 资讯 InfoQ

Presentation: Compiling Workflows into Databases: The Architecture That Shouldn't Work (But Does)

Jeremy Edberg & Qian Li discuss why external orchestrators decrease reliability and how to use your existing database for durable execution. They share how DBOS Transact uses standard tables, SKIP LOCKED queues, and unique primary keys to manage complex, fault-tolerant AI workflows with minimal latency, all without the operational overhead of separate distributed systems. By Jeremy Edberg, Qian Li

Jeremy Edberg, Qian Li 2026-07-23 18:26 8 原文
AI 资讯 HackerNews

Show HN: Running PrismML's Bonsai inside DRAM by breaking DDR4 timing rules

The excitement surrounding PrismML’s 1-bit/ternary Bonsai models has the industry closely watching how smartphone giants, particularly Apple, will implement LLMs on edge devices. Moving AI on-device is a brilliant and necessary strategy. It ensures absolute user privacy in alignment with EU regulations, fundamentally shifts the economics away from costly cloud inference, and paves the way for a significant hardware upgrade supercycle as users seek true AI-capable silicon. To create a smart on-de

pcdeni 2026-07-23 18:14 2 原文
AI 资讯 The Verge AI

Google now lets you sign in to your account using a selfie video

Google announced yet another way to gain access to your account if you get locked out, forget your password, or don't have access to the phone, computer, or two-factor authentication apps you typically use. As the name implies, selfie video lets you capture a short video of your face on a mobile device or PC, […]

Andrew Liszewski 2026-07-23 18:00 12 原文